Tag: alimentary canal

Questions Related to alimentary canal

Aggregates of lymphoid tissue present in distal portion of small intestine are known as 

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Villi

  2. Rugae

  3. Choroid plexus

  4. Peyers patches

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Correct Option: D

Absence of enzyme in small intestine will severely affect digestion of proteins

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Maltase

  2. Lipase

  3. Enterokinase

  4. Pancreatic amylase

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Correct Option: C

First portion of small intestine is called

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Jejunum

  2. Duodenum

  3. Cystic duct

  4. Ileum

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Correct Option: B

Which is absorbed in ileum?

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Vitamin K

  2. Bile salt

  3. Fat

  4. Glucose

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Correct Option: D

Middle part of small intestine is

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Ileum

  2. Jejunum

  3. Duodenum

  4. Pyloric region

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Correct Option: B

Which of the following guards the opening of hepatopancreatic duct into the duodenum

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Sphincter of Oddi

  2. Semilunar valve

  3. Ileocaecal valve

  4. Pyloric sphincter

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Correct Option: A

Ileocaecal valve is present in between

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Colon and large intestine

  2. Colon and small intestine

  3. Stomach and small intestine

  4. Cardiac stomach and fundus

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Correct Option: B

In jejunum, which of the following enzymes is required for the digestion of amino acid containing compounds?

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Chymotrypsin

  2. Pepsin

  3. Trypsin

  4. Peptidase

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Correct Option: D
Explanation:

Peptidases are the intestinal proteases, which act on peptides as follows:
$Polypeptide\xrightarrow[Alkaline \,medium]{Polypeptidase} Dipeptides$


$Dipeptide\xrightarrow[Dipeptidase]{Alkaline \,medium} Amino acids$
Pepsin, trypsin, and chymotrypsin, etc are aminopeptidases, which act upon amino groups of the peptide bond. 
Thus the correct answer is option D.

VERY SHORT ANSWER TYPE
Consider the following two statements A & B and select the right from (i)-(iv) about their correctness.
A. Small intestine is shorter than large intestine.
B. Small intestine is wider than large intestine.

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. Both the statements are correct.

  2. Both the statements are wrong.

  3. Statement A is correct, B is wrong.

  4. Statement B is correct, A is wrong.

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Correct Option: A

If the inner surface of the ileum in the human small intestine was smooth, rather than being folded and subdivided into vilii, which of the following statements would be true? 

bio-chemistry digestion digestion in small intestine digestive glands and their secretions alimentary canal

  1. The rate of absorption of digested food molecules would be higher, because the digested food would pass more easily through the digestive tract.

  2. Digestion would not be as effective, because there would be fewer cells secreting trypsin (a protein-digesting enzyme).

  3. Humans would have needed to evolve a much longer small intestine to absorb sufficient nutrients from their food.

  4. Humans would not be able to survive, because the digestive tract would be more susceptible to damage.

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Correct Option: C
Explanation:

The correct answer is (c).